摘要：
B. Mike and Feet time limit per test 1 second memory limit per test 256 megabytes Mike is the president of country What-The-Fatherland. There are n be 阅读全文
摘要：
D. Gargari and Permutations time limit per test 2seconds memory limit per test 256 megabytes Gargari got bored to play with the bishops and now, after 阅读全文